Introduction: The complications of diabetes mellitus are influenced not only by the duration of the diabetes mellitus but also by the average level of blood glucose along with glycated haemoglobin. Raised serum ferritin may possibly be related to the occurrence of long term complications of diabetes, both microvascular and macrovascular. Objective: The aim of this study is to establish a correlation between serum ferritin, fasting plasma glucose and glycated hemoglobinin type 2 diabetes mellitus patients. Materials and Methods: This was a cross-sectional study of 100 cases, visiting medical outpatient department of SGT Medical College and Hospital, Budhera, Gurugram, Haryana. Sample were analysed for the measurement of FPG, HbA1c and Serum Ferritin (by ELISA). Results: The mean FPG, HbA1c and serum ferritin levels were significantly higher with P__ampersandsignlt;0.01 in diabetic group compared to controls. Serum ferritin was significantly related to the duration of diabetes (P__ampersandsignlt;0.05). As the duration of diabetes increased, serum ferritin levels were also increased. Also there was a positive correlation between serum ferritin and FPG, HbA1c. Serum ferritin is significantly related to FPG (r-0.903, P__ampersandsignlt; 0.01) in diabetic patients. Serum ferritin is also positively related to HbA1c (r-203, P__ampersandsignlt;0.05). Conclusion: Findings of this study concludes that serum ferritin is elevated in patients with type 2 diabetes mellitus when compared to healthy individuals and it indicates that serum ferritin can be used as a marker for glycemic control in diabetic patients. .